ALEXANDRIA, Va., Sept. 17 -- United States Patent no. 12,414,579, issued on Sept. 16, was assigned to Wenger Manufacturing Inc. (Sabetha, Kan.).

"Food processing system including extruder with hollow core screw assembly" was invented by LaVon Wenger (Sabetha, Kan.), Allan C. Spellmeier (Fairview, Kan.) and Philip B. Wiltz (Sabetha, Kan.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Apparatus and methods for food production including a food preconditioner (228) operable to heat and partially pre-cook food ingredients, and a twin screw extruder (20) operable to further cook the preconditioned ingredients to create final food products. The extruder (20) includes a pair of hollow core extrusion screws (50, 52, ...